Sound Detection in a Flow by Static Pressure Measurement
Sound Detection in a Flow by Static Pressure Measurement
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通过静压测量检测流体中的声音
DOI：
10.11395/jjsem.13.52
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
大西一弘
中科院分区：
文献类型：
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作者：
寺島修;渡辺徹;森田潔;阿部行伸;酒井康彦;長田孝二;大西一弘
本文提出了一种研究声波和声源在流动中传播特性的新方法。这是通过使用锁定放大器测量流中的静压波动来实现的。通过使用一个非常小的静压探头来测量流体中的静压波动，该静压探头由一个在其壁上具有8个静压孔的薄压力管和一个0.1英寸的麦克风组成，该麦克风设置在连接到管的探头的扩口中。发现本方法能够准确地识别流中声音的传播方向。它还检测了两种不同的声源，起源于卡门涡街背后的圆柱和孔安装在它。
A new method is proposed for investigating the propagation characteristics of a sound wave and a sound source in a flow. This is achieved by measuring the static pressure fluctuation in a flow using a lock-in-amplifier. The static pressure fluctuation in a flow is measured by using a very small static pressure probe consisting of a thin pressure tube with 8 static holes on its wall and a 0.1-in microphone set into the flare of the probe connected to the tube. The present method is found to accurately identify the propagation direction of the sound in a flow. It also detects two types of different sound sources that originate from the Karman vortex streets behind a cylinder and holes installed in it.